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Exam 2: Biological Beginnings

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Question 1

Multiple Choice

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Sasha's 23rd chromosome pair contains two X chromosomes. This indicates that Sasha

A) has Down syndrome.
B) has fragile X syndrome.
C) is a female.
D) is a male.

E) A) and D)
F) B) and D)

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Question 2

Multiple Choice

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A cell that contains 23 pairs of chromosomes divides by mitosis to form two new cells. How many pairs of chromosomes does each new cell contain?

A) 12
B) 23
C) 6
D) 48

E) A) and D)
F) B) and C)

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Question 3

Short Answer

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Tadi lives in a community where women generally keep preterm babies close for skin-to-skin contact. This is called ________ in the U.S.

Juan-Carlos was born full term but was underweight for his gestational age. He would be considered

Which of the following statements is true of the birth process?

The germinal period of development takes place in the ________ after conception.

Jason, a 4-year-old, has an intellectual disability and has shorter limbs than other children his age. His pediatrician observes that Jason has a protruding tongue and an extra fold of skin over his eyelids. Jason's mother informs the pediatrician that she was 30 at the time of Jason's birth and that he was born with a flat skull. From this information, the pediatrician will most likely diagnose Jason with

A recessive gene exerts its influence only if both genes of a pair are

Tara has just entered the fetal period. Therefore, it has been ________ months since conception.

Brianna goes to a doctor who specializes in identifying genetic flaws to help prevent the risk of abnormalities. This doctor is called

Voletta is at the stage of pregnancy where the zygote has attached itself to the uterine wall. This scenario indicates the ________ stage of prenatal development.

Which of the following is the correct sequence of the periods of prenatal development?

Jessica is a 25-year-old woman who often drinks alcohol. Now that she is pregnant, her doctor has advised her to avoid alcohol as it has been proven to cause abnormalities in the offspring. According to recent research, which of the following is a known abnormality?

"Teratogen" comes from the Greek word "tera," which means ________.

The attachment of the blastocyst to the uterine wall begins the ________ period of prenatal development.

________ refers to the attachment of the zygote to the uterine wall.

Sandra excels in reading and spelling but struggles with mathematics. She is shorter than her peers and has a webbed neck. Her doctor has determined that she has one X chromosome missing. Sandra most likely has

The embryo's ________ develops into the digestive and respiratory systems.

Zia is pregnant and has a disease that, if untreated, may result in eye and skin lesions in her baby. Which of the following diseases does Zia have?

Which of the following statements is true of the layers of cells of an embryo?